Improvement in saw-tooth swages



J; CONNOR.

Saw-Tooth Swages.

1 No, 130,484., Patented Aug. 13,1872.

UNITED STATES PATENT OFFICE.

JOHN CONNOR, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SAW-TOOTH SWAGES.

Specification forming part of Letters Patent No. 130,484., dated August13, 1872.

Specification describing an Improved Saw- Iooth Swage, invented by JOHNCONNOR, of Philadelphia, Pennsylvania.

Improvement in Saw-Tooth Swage.

The object of my invention is a saw-tooth swage of a more economical anddurable character than those of the class to which my inventionappertains. My improved swage consists of but two parts, namely, theblock A, of steel, and the band or'ferrule B, one side of the latterbeing removed in the perspective view illustrated in the accompanyingdrawing for the better demonstration of my invention.

The block A is of proper shape and dimensions for being grasped by onehand of the operator, and is suitably rounded at the outer end forreceiving the blows of the hammer in the other hand of the operator. Inthe present instance two angular notches, a a, are formed in the swagingend of the instrument, and two holes, b b, are drilled transverselythrough the block, the metal intervening between the bottom of eachnotch, and. the adjacent hole being severed with a fine saw. The slotsthus formed, however, are tightly closed on driving the tapering ferrule13 onto the tapering end of the block, and thus a sharp, well-definedcorner is always presented where .the two sides of each notch meetaforacting on the extreme cutting-edge of a sawtooth, the perfection of theswage depending. upon the perfection of the bottom of each notch.

In saw-tooth swages of this class detachable pieces are usually fittedto the swaging end for the formation of the notch. I not only saveexpense by dispensing with these pieces, which demand accurate fitting,but, by making the block A of one solid piece, in the manner described,increased solidity and durability are imparted to the instrument.

It will be observed that one of the notches has slightly rounded sides,which have the effect of spreading the cutting-edges of a sawtooth, theother notch having straight sides for imparting the proper straight edgeto the tooth after the latter has been spread.

I claim as my invention- A saw-tooth swage composed of a block, A,notched, drilled, and slotted, and combined with a tapering ferrule, B,all as set forth.

In testimony whereofl have signed myname to this specification in thepresence of two subscribing witnesses.

JOHN CONNOR.

Witnesses:

WM. A. STEEL, JOHN K. RUPEnTUs.

